FINT
 
     FINT is the contour fill interval, minimum and maximum values
     separated by slashes:

		fill interval / minimum / maximum

     The contour fill interval may be any real number.  If it is not
     specified or if the value is 0, the program will select an interval
     which will generate 5 to 10 contour fill levels.

     The minimum and maximum values specify the range of data to use in 
     selecting the fill levels.  If either value is not specified, the 
     value will be obtained from the range of values in the dataset.  If 
     the minimum and maximum are equal, that value will be used and only 
     one contour fill level will be selected; however, since the number
     of colors is one greater than the number of fill levels, two colors
     will be needed--the first for filling regions with values less than
     the input value and the second for filling regions of greater value.

     A list of two or more fill levels may be entered using semicolons 
     to separate the individual values.  In this case, the minimum and 
     maximum are ignored.